[nazgul17]

Is my understanding right that the system is limited by the capability of teachers to solve their own problems? The TrueSkill of teachers doesn't seem to increase all that much, but I suppose TrueSkill works like that if the whole population gets better.

[AMavorParker]

The teachers never attempt to solve their own problems, only the students solve problems.

Regarding the TrueSkill of the teachers, the self-play settings we operate in in this paper are zero-sum competitive which means that the population skills cannot both increase together, as the objective of one population is adversarial against the other -- generating difficult tasks (teachers) but making difficult tasks easy (students learning to solve them)